Thanks they do indeed pull out. I was hard pressed to believe that HP wouldn't design it that way. The one was very tight that I was trying. Swapped with another and indeed that nixie is bad. May try lowering the 47K from the 170V a drop on that tube to see if I can revive it.
On Sat, Jan 9, 2010 at 1:04 PM, jmfranke <[email protected]> wrote: > For the 5245L, the Nixies pull straight out of their sockets. They pull > out perpendicular to the faceplate. > > John WA4WDL > > -------------------------------------------------- > From: "paul swed" <[email protected]> > Sent: Saturday, January 09, 2010 12:29 PM > To: "Discussion of precise time and frequency measurement" < > [email protected]> > > Subject: Re: [time-nuts] HP 5245L counter circa 1967 humor > > Very very interesting read on hollow leads. Like you I also had spares in >> the conductive foam and learned the same thing. Very bad indeed. >> >> I do need to look at several of the decoders to nixies they are acting >> strange and would easily guess that the neon bulb logic has some flaky >> bulbs. I started opening that section up and stopped. Its going to be a >> fair >> job. It will be really curious how did they get all those little photo >> resistors around the neon bulbs? Though with humor a 74ls90 cntr 7475 >> latch >> and 74141decoder would eliminate all of that, but thats not how the unit >> works. hate to hack it that way. >> Anyone know if the burroughs nixies just pull out of the socket? At least >> I >> think its a socket. >> I tried and they did not let go. I want to separately test the nixie I >> think >> its actually OK. >> Thanks >> PS I don't see carcasses anymore at flea markets. More importantly no test >> equipment anymore. The ebay effect. >> >> On Sat, Jan 9, 2010 at 10:46 AM, David Forbes <[email protected]> >> wrote: >> >> At 9:59 AM -0500 1/9/10, Gary Chatters wrote: >>> >>> >>>> The 5261A Video Amplifier plug in will get the sensitivity down to 1 mv. >>>> >>>> The 5258A Sensitive Prescaler will also get the sensitivity down to the >>>> 1 >>>> mv range as well as extend the upper frequency range to 200MHz. >>>> >>>> >>>> >>>> Gary >>>> >>>> >>> Gary, >>> >>> Thanks for the idea. I'll look for those plugins. I actually remember >>> thinking about getting the video amplifier many years ago, but that was >>> in >>> the year 6 BE (before ebay). >>> >>> >>> -- >>> >>> --David Forbes, Tucson, AZ >>> http://www.cathodecorner.com/ >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
